Integrally Formed Fan Guard

ABSTRACT

Disclosed are an integrally formed fan guard and its manufacturing method. The fan guard includes a top side and a circumferential side around the outer periphery of the top side, and the top and circumferential sides are formed by a metal plate by a single or multiple stamping and extrusion method. An air hole is formed by stamping at the top side or both of the top and circumferential sides for flowing air, and a central through hole is formed at the center position of the top side. In the manufacturing method, the fan guard is formed by stamping or extruding a steel plate directly by stamping and extrusion equipments. The invention does not require a high welding skill, and the fan guard so manufactured has the advantages of high efficiency, consistency, and pass rate, and thus reducing the production cost significantly.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to the field of fan guards, and more particularly to an integrally formed fan guard and its convenient manufacturing method that can reduce the cost of the fan guard effectively.

Description of the Related Art

In general, a fan such as a floor fan, a table fan, a fan lamp, etc has a vane installed in a fan guard, and the fan guard not just protects the vane only, but also facilitates the flow of air. Therefore, most present existing fan guards are bowl-shaped structure formed by welding steel wires or bars. Such fan guard features light weight and facilitates airflow, and thus has been used for many years so far. However, this fan guard also has the following drawbacks. Firstly, the structure of the fan guard requires a molding process of the steel wires or bars in advance, and then the molded steel wires or bars are welded and connected. Since the welding process has a certain requirement on the technical skill of a welder, therefore the pass rate of the product is directly related to the technical skill of the welder, and the production cost of this fan guard is always high. In addition, such fan guard usually has an axial flow structure, so that a through hole must be formed at the center of the fan guard for installing a motor and installing a motor shaft into the fan guard. At present, most fan guards made of steel wires or bars have insufficient strength to carry the motor after the center through hole is formed. Therefore, a reinforced metal plate is welded at the central through hole in order to carry, install and position the motor. The metal plate cannot be fixed to the fan guard by screws and usually are welded, and thus further increasing the production cost.

In view of the aforementioned drawbacks of the prior art, the inventor of the present invention conducted extensive research and development, and finally provided a technical solution of forming the fan guard by using a steel plate directly or stamping the steel plate to improve production efficiency and reducing production cost.

SUMMARY OF THE INVENTION

Therefore, it is a primary objective of the present invention to provide an integrally formed fan guard and its manufacturing method with the features of simple structure and convenient manufacture, so as to reduce the production cost significantly.

To achieve the aforementioned object, the present invention provides an integrally formed fan guard comprising a cover body which is integrally formed, and an air hole formed on the cover body and provided for flowing air.

In the aforementioned fan guard, the cover body comprises a top side with a circular arc surface, a plurality of first air holes radially distributed on the top side, and a circumferential side disposed around an outer periphery of the top side; wherein the top side and the circumferential side are integrally formed by a stamping and extrusion method.

In the aforementioned fan guard, a flange is formed at the junction of the top side and the circumferential side.

In the aforementioned fan guard, a central through hole is formed at the center position of the top side, and a mounting part is fixed to the central through hole or integrally formed with the central through hole.

In the aforementioned fan guard, the mounting part has an outwardly extended outer periphery, an inwardly extended inner periphery and a side coupled to the outer periphery and the inner periphery.

In the aforementioned fan guard, the outer periphery is fixed to an edge of the central through hole of the top side, and the inner periphery and the side have a mounting hole formed thereon and provided for installation fixing.

In the aforementioned fan guard, the first air hole formed on the top side is a tapered striped hole, and an end of the first air hole near the central through hole is narrower than the end of the first hole away from the central through hole.

In the aforementioned fan guard, the circumferential side has a plurality of uniformly distributed second air holes, and the plurality of second air holes is formed by a plurality of striped holes or circular holes.

To achieve the aforementioned objective, the present invention also provides a manufacturing method of an integrally formed fan guard, comprising the steps of: forming a top side of the fan guard and a circumferential side around the outer periphery of the top side by using a metal plate by a single or multiple stamping and extrusion method; and stamping the top side to form an air hole for flowing air, or stamping both of the top side and the circumferential side to form an air hole for flowing air and the center position of the top side to form a central through hole.

The aforementioned manufacturing method of an integrally formed fan guard further comprises the steps of: forming a flange which serves as a reinforcing rib at the junction of the top side and the circumferential side by a roll press method; and installing a mounting part for installation and fixing at the position of the central through hole by a screwing, riveting, welding, or integral formation method, wherein the mounting part is provided for mounting the fan guard and a fan to another device or part.

Compared with the prior art, the present invention has the following advantages and effects. In the manufacturing method, the fan guard is formed by stamping or extruding a steel plate directly by stamping and extrusion equipments. The invention does not require a high welding skill, and the fan guard so manufactured has the advantages of high efficiency, consistency, and pass rate, and thus reducing the production cost significantly. In the actual implementation of the present invention, the fan guard of the invention has a production cost approximately 30˜40% lower than that of the conventional fan guards.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the present invention;

FIG. 2 is another perspective view of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a cross-sectional view of Section A-A of the present invention A-A; and

FIG. 5 is a bottom view of a mounting part of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The technical characteristics, contents, advantages and effects of the present invention will be apparent with the detailed description of a preferred embodiment accompanied with related drawings as follows.

The present invention discloses an integrally formed fan guard and a manufacturing method of the integrally formed fan guard. With reference to FIGS. 1 to 5 for a fan guard of the present invention, the fan guard comprises a cover body 10 and a mounting part 4 fixed to the cover body 10.

The cover body 10 is manufactured by an integral forming method, and an air hole is formed on the cover body 10 for flowing air. The mounting part 4 may be fixed to the cover body 10 by a screwing or riveting method. The whole product does not require any welding process and automated process may be used to improve production efficiency and assure product quality.

Specifically, the cover body 10 includes a top side 1 and a circumferential side 2 integrally formed with each other.

The top side 1 is substantially a circular arc surface, and a central through hole 12 is formed at the center of the top side 1 for installing and fixing a mounting part 4, the top side 1, and a plurality of first air holes 11 are radially distributed with respect to the center of the central through hole 12, and each first air hole 11 is a tapered striped hole. In other words, an end of the first air hole 11 proximate to the central through hole 12 is narrower than the other end away from the central through hole 12, and the distance between any two adjacent first air holes 11 is the same, and such design prevents the airflow from producing too much noises.

The circumferential side 2 is disposed around the outer periphery of the top side. To further improve the ventilation effect, the circumferential side 2 may have a plurality of uniformly distributed second air holes 21, the plurality of second air holes 21 are grouped and uniformly distributed on the circumferential side 2, and each group of second air holes 21 is formed by a plurality of striped holes, and the striped holes at the middle are longer than the striped holes on both sides.

A flange 3 may be formed at the junction of the top side 1 and the circumferential side 2, and the flange 3 provides the effect of a reinforcing rib. Since the flange 3 is formed at the junction of the top side 1 and the circumferential side 2, therefore the diameter of an opening of the cover body 10 can be maintained constant to facilitate the engagement of an outlet cover of the fan.

The mounting part 4 has an outwardly extended outer periphery 41, an inwardly extended inner periphery 42, and a side 43 coupled to the outer periphery 41 and the inner periphery 42, and the outer periphery 41 is fixed and coupled to an edge of the central through hole 12 of the top side 1, and the inner periphery 42 and the side 43 have a plurality of mounting holes formed thereon and provided for installation and mounting.

In the manufacture of the fan guard, the top side 1 of the cover body 10 and the circumferential side 2 around the outer periphery of the top side 1 are made by stamping a metal plate for one or more times, and air holes are formed on the top side 1 and the circumferential side 2 by stamping, and a central through hole 12 is formed at the center position of the top side 1.

In the manufacture of the flange 3, a flange 3 serving as a reinforcing rib is formed at the junction of the top side 1 and the circumferential side 2 by a roll press method, and finally a mounting part 4 used for installing and positioning is fixed to the position of the central through hole 12 by a screwing, riveting, or welding method, and the mounting part 4 is provided for mounting the fan guard and a fan to another device or part.

Compared with the prior art, the present invention has the following effect and advantages. In the manufacturing method, the fan guard is formed by stamping or extruding a steel plate directly by stamping and extrusion equipments. The invention does not require a high welding skill, and the fan guard so manufactured has the advantages of high efficiency, consistency, and pass rate, and thus reducing the production cost significantly. In the actual implementation of the present invention, the fan guard of the invention has a production cost approximately 30˜40% lower than that of the conventional fan guards.

It is noteworthy that the present invention may adopt an extrusion method (or a cold press method, or a hot press method according to different specifications or parameters such as the type of material, and the thickness and deformation of the material, etc) to integrally form the top side 1 and the circumferential side 2 around the outer periphery of the top side 1, and the mounting part 4 may be integrally formed at the position of the central through hole 12 of the top side 1. The first air hole 11 and the plurality of second air holes 21 may be designed as striped holes, circular holes or holes of any other shape.

While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims. 

What is claimed is:
 1. An integrally formed fan guard, comprising: a cover body, which is integrally formed; and an air hole formed on the cover body, for flowing air.
 2. The integrally formed fan guard of claim 1, wherein the cover body comprises: a top side with a circular arc surface, a plurality of first air holes radially distributed on the top side; and a circumferential side disposed around the outer periphery of the top side, and the top side and the circumferential side being integrally formed by a stamping and extrusion method.
 3. The integrally formed fan guard of claim 2, further comprising a flange formed at the junction of the top side and the circumferential side.
 4. The integrally formed fan guard of claim 3, further comprising a central through hole formed at the center position of the top side, and a mounting part is fixed to the central through hole or integrally formed with the central through hole.
 5. The integrally formed fan guard of claim 4, wherein the mounting part has an outwardly extended outer periphery, an inwardly extended inner periphery and a side coupled to the outer periphery and the inner periphery.
 6. The integrally formed fan guard of claim 5, wherein the outer periphery is fixed to an edge of the central through hole of the top side, and the inner periphery and the side have a mounting hole formed thereon and provided for installation fixing.
 7. The integrally formed fan guard of claim 2, wherein the first air hole formed on the top side is a tapered striped hole, and an end of the first air hole near the central through hole is narrower than the end of the first hole away from the central through hole.
 8. The integrally formed fan guard of claim 2, wherein the circumferential side has a plurality of uniformly distributed second air holes, and the plurality of second air holes is formed by a plurality of striped holes or circular holes.
 9. A manufacturing method of an integrally formed fan guard, comprising the steps of: forming a top side of the fan guard and a circumferential side around the outer periphery of the top side by using a metal plate by a single or multiple stamping and extrusion method; and stamping the top side to form an air hole for flowing air, or stamping both of the top side and the circumferential side to form an air hole for flowing air and the center position of the top side to form a central through hole.
 10. The manufacturing method of an integrally formed fan guard according to claim 9, further comprising the steps of: forming a flange which serves as a reinforcing rib at the junction of the top side and the circumferential side by a roll press method; and installing a mounting part for installation and fixing at the position of the central through hole by a screwing, riveting, welding, or integral formation method, wherein the mounting part is provided for mounting the fan guard and a fan to another device or part. 